What happened: Alexis Sánchez joins on a free transfer as a Designated Player. The former Sevilla striker arrives in MLS at age 37.
Why it matters: The signing adds an experienced attacker to Montreal's regular-season roster. His Designated Player status makes him a central piece of the club's plans.
By the numbers: Sánchez has made 161 appearances for Chile.
What to watch: Attention turns to when Sánchez will be available for MLS play.